Damper control device



June 16, 1931.

T. B. COWLES DAMPER CONTROL DEVICE Filed Nov. 18, 1927 Patented June 16, .1931

' UNITED: STATES:

Lei

PATEW oiesics THEODORE B. COWLES, F MADISO1\T,'WISCONSIN, ASSIGNOR 0F ONE-HALF TO CHARLES]: M. PARIQOF jMADISON', WISCONSIN DAMPER CONTROL DEVICE This invention relates to damper control devices.

Objects of this invention are to provide a novelform of damper control in which] both 5 the ash pit draft door, andthe check draft or damper, are simultaneously controlled through the medium of a gravity actuated member controlled in turn by a clock, so that the clock maybe set to operate at the desired 0 time to open the draft door and close the check draft. 1

Further objects are to provide a novel form of apparatus having the characteristics noted above in which a rocking lever is employed, which may be attached to the ceiling above the furnace or in any'desired place in the basement and whose opposite ends are attached to the damper or check valve and to the draft door either directly or by guide 29 pulleys. This rocking lever is, in turn, controlled by simple clock mechanism.

Further objects of this invention are to provide a novel formlof construction which can be applied to a building so that a crank is 95 available at any desired point or floor in the building to wind the control cable for the rocking lever into its draft checked position,

and to provide clock controlled latching means of simple structure which may be op- 30 erated automatically or manually to allow the draft to be turned on. i I

Embodiments of the invention are shown in the accompanying drawing in which The figure in the drawing represents a vertical section of a structure with my improved device illustrated in. elevation and having parts thereof broken away and shown in cross section. 7

When it is desired to install the control to device in a new construction, it will be found desirable to house the cable 12'inthe wall. This is readily accomplished by the construction shownin' the figure, in which the walls are indicated by the reference character 30 and a 2 x 4 or other studding, indicated by Application filed November 18, 1927.. Serial No. 234,134.

the reference character 31. bracket is secured to the studding and carries a drum 33 upon which the cable 12 is wound. This drum is provided with a shaft 34 equipped with a key 35 which is housed in the box; like member 15. The shaft 34 is adapted to receive the shaft 36 of the crank 37, such crank shaft being provided with a suitable keyway for the reception of the key 27.

Thus, all that is necessary is to position the bracket 32 and the associated parts, while the house is being constructed, and thereafter slip the crank shaft into place. The crank shaft is provided with a disc 38 provided with a pair of notches adapted to be engaged by the pawl 20 in the manner previously described.

Although the invention has been described in considerable detail, such description is in tended as illustrative rather than limiting as the invention may be variously embodied and as the scope of such invention is to be determined as claimed.

It is apparent that the apparatus may op-i erate a furnace having more than two doors or in other words more than two draft control devices. For example, as used in certain types of furnaces, a third draft control is.

provided. This third draft control may be either'a slide or door.

I claim: A device of the class described including a supporting bracket, havingspaced perfo rated ears, a shaft rotatably mounted in said I ears, a drum on. the shaft between said ears,'a key at one. end of said shaft, a housing sup ported adjacent the bracket having a hori- Zontal shelf at its upper side, a crank hav ing one end rotatably mounted in the housing with its terminal projecting beyond one wall thereof and having a keyWa-y for the reception of the key on the shaft, a notched disc on the crank shaft Within the housing and a movable stop carried by the shelf and adapted to be engaged by the crank handle for limiting the movement of the same.

In testimony that I claim the foregoing I have hereunto set my hand at Madison, in the countyof Dane and State of Wisconsin.

THEODORE B. COWLES. 

